Finding the Fourth Proportional to 1,965.81, 2,712.83 and 1,081.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.81 : 2,712.83 = 1,081.61 : x
2. Step 2: Convert to fraction form
   1,965.81/2,712.83 = 1,081.61/x
3. Step 3: Cross multiply
   1,965.81x = 2,712.83 × 1,081.61
4. Step 4: Simplify right side
   1,965.81x = 2,934,215.26
5. Step 5: Solve for x
   x = 2,934,215.26/1,965.81
6. Step 6: Final answer
   x = 1,492.63